Besides the well-known cloud to ground lightning visible during thunderstorms, there are many rarer, and often quite spectacular, lightning events. Gigantic jets propagate from the tops of thunderstorms but are historically hard to detect. Recent advances in gigantic jet detection using machine learning and combining data from multiple sensors (Optical, VLF, ELF) has expanded the available data on these events. Gigantic jets can even reach all the way to the plasma barrier between earth and space (the ionosphere). This part of the atmosphere is incredibly dynamic and affects the propagation of radar signals on Earth and in space. The D-region is the lowest region in altitude as well as the most dynamic of the ionosphere. In this investigation, we combine the expanded gigantic jets dataset with recent techniques for ionospheric remote sensing to compare the D-region ionosphere before and after a gigantic jet event. This will elucidate potential effects gigantic jets have on the D-region of the ionosphere. Moreover, using the same techniques, we will explore statistically how high current lightning events impacts the D-region of the ionosphere.